I’m going to say GSBW rewards, with Hollow Point Kiss giving out Deadpool rewards. That covers all of the featured characters in the current PVE during that time, which is something that seems to have been happening lately. Also means Storm (which has desirable progression rewards at 300, 900, 1100) will see increased play for GBSW, who is less desired. Her PVP with DP rewards would be hotly contested instead of lackluster.
I actually like fighting hulk. His powers tend to be not very damaging, so he fits my tendency to fool around until I can drop an ap bomb to flatten him in one go. Extreme overkill on some squishy is funny but not nearly as satisfying as nuking lthor or hulk.
Here is a scary thought. They will run Deadpool as the prize and then for the Deadpool tourny they will run spiderman. That way people will go hard in the Category-5 for the deadpool rewards and will also go hard in the Deadpool for the progression Deadpool. My other random guess is that next week we will have a 2.5-3 day PVE with a new character. A X-men starting with a B. This way we will have had 2 new characters in Season 4.