Quoted from pezpunk:the top 100 list is the only use of games in the pinside database. i know people are sensitive about hose silly rankings, but in practical terms people will want to find information specific to MMR, add MMR to their collection, search for threads tagged with MMR, and read information / stats / etc specific to the remake. i really dont think it makes sense to pretend MMRLE and the original MM are the same entity from Pinside software's point of view. gameplay is literally the only thing they have in common.
I think it could be added to the database, but not the rakings. If you were to rate the game, the ratable aspects should be nearly identical - artwork, gameplay, playfield, sounds (could be improved in the remake though). I don't see any point in diluting the rankings and making them even less relevant than they already are.