Here's an idea;
Work on getting stuff functional first, worry about aesthetics and models later.
Iron Man can be a big Ranger until one of us makes Iron Man models. Thor can be a Worker with a lightning sledgehammer. The Avengers tower can be a Command Center until we get an Avengers Tower model. The Avengers can use the USA Controlbar. And so on, you get the idea.
Also....
Get a basic outline together for a plan, tell us what you want us to do so we'll have an idea where to start. Ask Precison_Bomber and your mate to start making models of Avengers.
I think we should just start with the Avengers faction since they're the most talked about and will probably be the biggest reason people would play this mod. Heck, you could make the whole mod just adding the Avengers into the base game even and nobody would complain.
Shield and Hydra we can figure out later.
Start coding stuff for what you have in mind. If you want I can also work up a rough draft for Quicksilver and Hawkeye units for what I have in mind for them.
Any old friends still on here can add me on discord @jcdenton2187. I'm far more likely to respond there.