Board Thread:Boruto Discussions/@comment-35319087-20180415224730/@comment-734582-20180416150553

Ravenlot 27 wrote: Still, no evidence for what purpose did Momoshiki put his mark on Boruto. It can be pretty much everything at this point, when we have no information about the nature of this mark. True. But of all the reasons he could've given the mark, with the information we have now, trying some sort of rebirth is the most logical.

It just seems weird that Momoshiki is so eager to help Boruto with a mark after sacrificing everything, even his companion, to kill him. Undoubtedly we'll learn more about the how an why, but right now the whole rebirth thing seems to make the most sense.