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[*]Quick and easy email to the whole of the group
[*]A separate costume for supergroup completely. This allows for uniformity in case the group wants that. Ours all wear the same uniform, so right now everyone is using a personal costume slot. And while this isn't so bad for people with 3 and 4 costumes, it's aggravating for any lower heroes coming in.
[*]The ability to change colors and chest details
after creation. And to tie in with this, the choice to
not have a chest detail on the SG costume if so desired.
[*]Regarding SGs and their Headquarters: The ability to place head to toe or even just bust pictures of each member in the supergroup in the main operations room, along the walls of the entry corridor, the trophy room, etc. Perhaps their names at the bottom of said photos or maybe even plaques like we have around Paragon already. The members in question could enter a small bio and have their own pic/statue with clicky plaque. A bit premature but it does have to do with the supergroups and would be way cool!

[*]Coordinated attacks? Bonuses for a single attack from the grouped SG members. Perhaps a designated group of powers that when used in unison as "The Coordinated Attack" do more damage, raise defense, yadda yadda. *The Greasy Spoon supergroup encounter Dr. Vahzilok and their leader shouts for members Rooty, Tootie, Fresh and Fruity to get ready to hit him with the Uktra Denny's Grand Slam maneuver* [/list]