Yes! It wouldn't be a complete crime-solving weekend in crime-ridden Neptune without Mr. Mars. With Colantoni on board, that means Veronica, Logan, and Keith are all confirmed — but, the real question is: WHERE'S WEEVIL?
IMDB lists Francis Capra as "rumored", but that better change to confirmed soon because you can't make a worthwhile VM movie without Weevil, the best character in all the cast/possibly land*.
*excluding Backup, obviously. Was just talking humans.