Don't expect these kits to appear this year or even early next year. I believe Martin has to establish a relationship with a tool and pattern maker and then secure a source to produce the kits even before he can bring them to market.
He was well on his way with the B-25s and the Meteor when the tool company and he parted ways. Those initial B-25s are going to be released by a yet unknown company...I have my guess written down on a piece of paper...and even the tool company has it on their website offering to produce it for anyone with the capital to do so after the contract with this again yet to be announce company has their run with them.
What many don't understand is many of the molds a company releases isn't their molds. Unless they have paid for them. A good example is Two Bobs released their T-2 Buckeye...the kit was produced by MPM and is now being rereleased by MPM. Others are doing the same, producing a kit under their own brand, then the kit is released later by the company that actually did the tooling and production.
Again, don't expect the P-61 or other kits on the list anytime real soon. It takes time to pull everything together and deliver. Personally I would have recommended he do like Tamiya...say nothing until its ready to ship.