It depends. If you're talking about Invisibility the power, then yes, neither your pets nor your teammates will benefit from Leadership. This applies to any "Only Affecting Self" power, including Invisibility and Phase Shift. While you have this flag on, you will be unable to attack and any toggle debuffs you have running will not work.
However, there are ways to obtain what players typically refer to as 'full invis', meaning being completely unnoticed by most enemies, without using a power that has the "Only Affecting Self" flag. Typically stacking two stealth effects will accomplish this while still allowing you to provide Leadership benefits to your team and pets as well as Supremacy to the pets.
Probably the most common way of accomplishing this is using a stealth toggle power (e.g. Shadow Fall, Stealth, Steamy Mist) and Super Speed, although a +Stealth IO and Super Speed or a +Stealth IO and a stealth toggle power will also work (as will a +Stealth IO in Super Speed itself).
It sounds like what you want is the pseudo-invisibility of "full invis" rather than Invisibility the power.
Iscariot's Guide to the Tri-Form Warshade, version 2.1
I'm sorry that math > your paranoid delusions, but them's the breaks -- Nethergoat
P.E.R.C. Rep for Liberty server
What about the illusion control powers Superior Invisibility and/or Group Invisibility? I probably should've mentioned those up front. Are they "stealth" powers? Their names confuse me.
Superior Invisibility and Group Invisibility both provide 'invis' level stealth without the "Only Affecting Self" flag. So you could run Leadership toggles, AOE debuffs, whatever, while those were active. Supremacy, too, in the case of Group Invisibility (since you can't get Superior Invisibility as a Mastermind but you could be affected by Group Invisibility if you were teamed with a Controller). Of course, any attack or debuff is going to cause enemies to notice you regardless of how much stealth or invis you have going.
Iscariot's Guide to the Tri-Form Warshade, version 2.1
I'm sorry that math > your paranoid delusions, but them's the breaks -- Nethergoat
P.E.R.C. Rep for Liberty server
Actually, this question applies to any AoE toggle, but the above is my main concern and makes for a short subject.
The MM forum says if you go invisible, your pets won't benefit from either supremacy or leadership toggles. Does this apply to players, too? If I have an AoE buff toggle on, and happen to be invisible, will it all be for naught? What about AoE debuffs, invisibility, and critters?