First of all, spoiler your shit, faggot.
The Neighborhood is already doing this; we invade Tumblr with Chan culture and get lulz out of it… But the thing is, Tumblr is a shit platform.
Tumblr is badly coded and ridden with bugs almost to the point of being unusable on PC, besides that the reply system is retarded as fuck and makes it a pain in the ass to figure out who replied to who… And the mods are major SJWs who won't hesitate to shadow ban you (in that case all your posts and replies are invisible except to your followers) or downright terminate your account. Enjoy your ban at the first gore picture you post.
The only people who benefit from using Tumblr are SJWs who blog about their madness, artsy fartsy faggots who like posting Photoshop shit-stains, and literally who celebs who run promo blogs with an open ask box to receive fan mail. Mind you that all of them blog from their phone or tablet using a dedicated app, and only respond to first-level replies because these are the only replies they are able to see anyway… and ofc none of use TOR
I would never think of it as an alternative to 8chan, even Infinity is better.