Over the past years I've done a lot of tinkering on this game, to reach a perfect roster with characters who are all balanced out against each other and good reflections of the heroes as I know them from the comics (so it won't be the case that, for example, Tigra is way more powerful than Thor. You won't believe the spreadsheet I maintain where I'm keeping tabs on power costs, damage, effects for every character on my roster...).
I've done a fair share of mod-remixes and I might still see about releasing some of them as boosters some day.
That said, lately I haven't had much time at all for tinkering or trying out mods, but that's for a very good reason. A month ago I became a proud father of a very lovely and healthy daughter!
(You guys might appreciate her middle name: Sif.)