It's not the update we were hoping for but it's "new content" nonetheless: All six Mega Man Mobile games have been updated with a new Boss Rush Mode.
It's nothing fancy: you'll face a gauntlet of Robot Masters in random order, one after the next. You have all your Special Weapons at the ready and each time you defeat a Robot Master, you'll get some Weapon Energy. Once all eight (or six) Robot Masters are defeated, the marathon repeats with little to no Weapon Energy drops. Rinse, repeat. Once you die your final score is ranked on a top 5 leader board.
Not much else to say than that. The update is live on iOS and Android now.