This is more or less how The Militia got started, with a team balanced by having all five (or seven if you want epics) archetypes.
The main problem you may have is whether you are tied to the idea of having all five playing at the same time. Are you willing to play as a team if one member of your team can't make it? What happens if a player drops out, do you actively try and recruit another of the same archetype to replace them or accept the imbalance and soldier on? We've been going for just over nine months now and our SG looks nothing like how it started. 
It's a good idea and one that certainly evolved into the best SG I've been in. When we're all together an in our matching uniforms there is something that feels delightfully epic about it all so it's well worth trying to start something like this up. I wish you the best of luck. 
@Dante EU - Union Roleplayer and Altisis Victim
The Militia: Union RP Supergroup - www.themilitia.org.uk
Thanks for the info Dante, im glad to here this sort of thing has worked in the past and manifested itself into something much greater 
Also i would like to state that if the project does go ahead there will be a number of issues to take into account. One is that all this would mostly likely not take place until after Issue 8, reason being that more is on offer and due to such change people may not be ready to be content to one character. Also i would like to raise the issue of a SuperGroup, from the sounds of it a SuperGroup could really enhance the overal play experience and not to mention much better communication. Hehe i have already thought of a SuperGroup name :P
Thanks for the comments Dante much appreciated and i will take on board the problems this may face
I'm assuming you're thinking along the lines of a certain popular four member super team when comign up with this idea?
I think it's a great idea, and I think it could work well providing you lay down guidlines for style of play at the start. Afterall a SG which is restricted to five members at one time isn't going to grow a base very quickly, or level if you restrict team play to when all five players are online!
If you are all in the same uniform (with 5 emblazened across your chests) and you create a "vibe" on here for celebrity do-gooders and ask other players to "play along" (asking for autographs, snapshots, etc), then this could be REALLY fun!!
Formerly @Crimson Archer, now @CA
The Militia - Protecting Paragon City through roleplaying since June 2006!
Adding to Archer and Dante's comments this is how we started as well. I'll keep an eye on here to see how your group develops. I like the idea because it reminds me of the Fantastic Four as Archer hinted, so i wish you the best of luck mate. If you have any questions or anything, the community here is great for support!
PS. Welcome to the Forums!
Edit: Just saw your post on the Defiant League PvP Event and thought I'd let you know in case you dont already, that most Roleplayers hang out on Union.
Yeah thanks a bundle mate, yeah when im on Union i find RP is much better than on Defiant, mainly thats why i love teaming on Union but i found it easyer to get to 50 on Defiant. Its best to have both
Yeah the Fantastic Four is alot like this (although i didnt directly link it to being like Fantastic Four), i just see it fit for every Archtype in one team and having RP backstory, SG and playing. So going back to the advice on Union being a better server to RP on, so it will be on Union. Thats one question down, many to go
Keep the posts coming!
I really like this idea. I'd need to think of a new hero though, so bare with me!
If possible... I would like to take the tank position if that is going!
Sounds great Falcon and im really gald people are interested in the idea.
Soon i will be posting a recruiting thread so we can start to see how this will unfold and reveal the Freedom 5!
I will keep you in special place for a tank seeing as you have declared your interested in the position so soon
Oooooo This Sounds Fabio ^_^ I'd Be Up For This, Scrap Or Blaster, Either Way Im Easy
Hi All,
We all want to be a hero do we not?
Well i would like to present a idea to make a fully 5 Different Archtype team (Blaster,Deffender,Controller,Scrapper and Tanker), with a Roleplaying theme of a real (comic) group out for freedom and fun!
Now i dont know if this has been presented before and im fairly sure it has, but i would like to give it a go if anyone would want to try. Remember its just a idea and nothing is offical, i just want to know if it will be a good idea and that if people would be interested in starting this type of 'project'.
Feedback:
1. I would like to know if people think its a good idea.
2. If people are interested.
3. Adivce on setting it up.
4. Questions, e.g Playing in RP, Characters, Archtype queries and Playing times.
Once i have feedback and infomation on the topic, i will contemplate if i should go forward with it and start a post for people wanting to join ect
Thanks.