Funny you should say that, theres actually several modern levels in SGWM already, and we are working on a SGWM:space race mini-expansion pack right now, along with a SGWM: modern disagreements 2 mini-expansion pack, because if you haven't heard, modern combat is the new world war 2.
"Goblins made interplanetary travel a few eons ago, and now they caught wind that The Human Space Corporations had been mooching on their idea of space travel and warp sub space technology for some time now and been battling each other over the limited space. It's now Payday, upgrade your goblin War machine with 'Space Propelling part' and 'Beam of light Thrower' as you fly through space blowing up their stations, and planets. Buy now and you get a free GWM-Colossus for Black Market and the all attachments you got from the SGWM expansion pack."