I doubt the Majestic Team would go for it, but what about them partnering up with ASOBO as the follow-on project after ASOBO/WT release the Praetor 600 in their expert series. Yes they lose some control but get access to a much larger market with official MS backing. They will have access to strong modelers as well as better access to Dev Team for Tech Support. (are turboprops now accurately modeled?)
Much like the WT partnership with ASOBO where WT is handling avionics, systems and performance while ASOBO is doing the modeling, this type of arrangement could also leverage the existing talents of Majestic in those same areas as WT while ASOBO handles the modeling which is currently Majestic's weakness.
Just a thought from another soul pining away for the Q400