The M&T site was recently sold, but I am not sure which developer bought it. It is zoned for a 51-story tower. The county owns the garage next door on the Hoboken Ave side, which is also zoned for 51 stories, and there have been discussions of combining the M&T site and the county site.
Would make sense to fold 616 Summit into the M&T site too since 616 Summit can only build 29 stories as a standalone site, but they seem intent on going forward on their own.