I saw the M series as targeting the audiophiles more-so than the djs/consumers. Also the LP series can be ran as a portable, I've seen it a few times at school (I see tonsss of beats though :/). Also I thought you were saying he should release both cans at the same time, of course he'll make new products eventually (duh, you don't need my level of experience in design and business to know that).
Also with people like sennheiser and beyerdynamic getting more into the higher end portables (amperior, dt1350) then if the M-100 is in fact a portable (but full size) then it may have to reach a higher price bracket than $300. The amperior is fully machined aluminum, with an iphone cable, fully replaceable cables and 350 bucks.
What, you think Val would be done making headphones after the M100? Gimme a break! I'm sure there's other stuff he has planned, too, but he's already making portables, so why not go ahead and make the best portable and THEN tackle the home market? Idk, makes more sense to me anyways.
Val can do whatever he wants, whenever he wants; I'm just putting in my .02 for a purely portable over-ear upgrade to the M80, and I think it would make sense to call it the M100