My greatest wish is the Clans being entirely retconned out.
I kinda doubt that's a realistic prospect, any more than undoing the death of ComStar during the Dark Ages.
It makes logical sense from a game-maker's perspective, but given the number of models PGI already has along with what they've said about the number of 'Mechs included in MW5, I find it unlikely they'll be modeling any more 3025 era 'Mechs. I think we're going to have to rely on wild success for HBS to do that themselves.
Which makes me so sad. It just seems logical they'd need more TRO:3025 and TRO:2750 designs to pad out MWO, MW and helps HBS. Yet since the HBS deal and MW5 was first announced all we've had has been the Javelin and Annhilator