You're kidding, right? You can't tell a story because we all know how it is picked up 10, 20, or 30 years in the future? That's so utterly wrong I don't know where to begin, so instead I'll point at another Bioware game that did just that and ended up as my favorite game of all time.Silentpony said:blah... If you do prequel, well no matter what happens, it all works out in the end because the ME games still happen. There can be no risk of Galactic extinction because the Reaper arc hasn't occurred yet. You can't have it set in the past because we already know how it ends. ...blah blah blah...
Knights of the Old Republic, begins before the Original Trilogy and tells a completely unrelated story. Did it not matter because somewhere down the line Luke blows up the Death Star... twice? No, it just didn't care about Luke and his gang and used the universe as a jumping off point.
I can think of half a hundred different prequel stories that are worth telling. Not all of them would be worth a trilogy unto themselves, but I have no difficulty playing a single game about fighting pirates and solving mysteries in the Skillian Verge, or about being one of the first Humans on Omega who eventually rises to lead a criminal syndicate that makes the galaxy tremble.
You don't have to keep rehashing the same "save the galaxy" story over and over to use the Mass Effect setting.