User blog comment:DeadDATA/Keep Your ME3 Saves/@comment-5017379-20120210151203/@comment-4491632-20120214014738

It's not particularly surprising. Bioware have frequently mentioned that the Mass Effect universe is far larger than the three game they've made and that a "Mass Effect 4" is highly likely. I know I'll be keeping hold of any ME3 data I have either way.