I like all their little training montages and powerups.
The panel in that previous chapter where Kaido and Big Mom were celebrating their alliance, lol. Can see now how they were able to interact and get along with before
On a side note... I was surprised when people started mentioning Law's betraying the Straw Hats, I get that it was hinted at early on and occasionally here and there, but like many others I think he doesn't have a direct reason to (at least not at this moment).
His facial expression on that last panel are pointing more towards an "oh shit, I gotta do something otherwise all our preparations are kaput" than anything else. I think if a betrayal does happen down the line it will be over something in after Kaido and less of a betrayal and more like "we're pirates, ya know, we can't be friends forever. may the strongest win"
Blood Bank was not my first yaoi, but was the story that really got me into the genre. It's nice to see that the epilogue.