I would like to see a little, secret romance between, but due to the writing in AOU and I'm happy got erase in infinity war and Endgame. These 2 had potential, but it was kind of rushed and I'm glad and happy that they erase it when the Russos came along and done better ways. I mean, Scarjo and Ruffalo do have really chemistry between each other and I blame the writing not them at all. I would be interesting, but what we got after AOU was far better and made more sense within the contexts of the stories afterwards.
I'm sad, but glad that Burce and Nat didn't have a lot romantic and sexual attachments to together, if it was written better it would be totally different type of a relationship and interesting too