Rockman Corner reader Joshua sent over this interesting 25th anniversary comment from Capcom's corporate officer Christian Svensson. Check it out:
"In December 'some but not all' plans for the coming year of celebrations will be shared. There are many moving parts and not everything will be done and final come December. No one has promised a game or even an announcement of one at that time. Please do keep expectations in check." [source]
The only thing it seems we can be certain of is that Capcom will be doing something (i.e. "celebrations") involving Mega Man, at the very least. I get the feeling that after the widespread meltdown of Mega Man Legends 3 and Mega Man Universe, Capcom won't be discussing the prospect of a new game until all the pieces are in place. The last thing we need is to have something announced prematurely and witness yet another cancellation because the project wasn't good and ready.
All we can do is simply wait and hope. And that's all that can be said for now, really.
Thanks for the tip Joshua!