Triangle Man! *edit* err. Triangle Man's weapon. So in the sense of making up some lame name for a weapon, the triangle beam, tri beam, tri force(that'd be a cool name,) etc, etc.
I'd like to see another Mega Man Powered Up. Hopefully Capcom can put more effort into it than the original Mega Man Powered Up as the level design for the new mode really wasn't that great at all, but atleast enjoyable. Also make Mega Man Powered Up 2 a combination between MM2 and MM3(best two in the series.)
There should be more of a diverse level creation system though. There are some enemies I'd like to have certain stages, but they force you to only have specific ones in all the packs that you can choose(and I have all the packs so I can't have all the enemies I want as some enemies aren't combined with others in packs.) It'd also be nice if they added the ability to actually do alot of platforming upward instead of putting an invisible ceiling that you can only fall down through but can't jump upward.