tumble pop; no chance
it was data east who went bankrupt a while back. all their copyrights etc are held by some ex-sage guy run mobile games comp in japan. who have failed to use even one of those licences yet. and have only succeeded in stopping nowpro releasing the all but complete metal max 2 on gba
as for snow bros, that was toaplan i believe. they are also long (lon---g) gone and i have no idea who holds the licences (if anyone)
8ing? cave? who knows
would be very cool to see both on a new system though