Do you think so ? I dunno, backlash could be huge if they did so, we're still sitting on 40M PS4 owners waiting to see if they've been screwed over or not...
"if needed" is the key word there. I don't think they will. Looks like this is the end of the road for xbox as we know it, from now on it will be a more abstract idea stradling the line between pc and xbox. Trying to find its own niche. Sony will have the core gamer market with Nintendo having their crowd with some overlap as always.
In short I think MS are done taking on Sony head-on.