I have no doubt that Roman Reigns, Jimmy and Jey USO will win their match against Solo Sikoa and his bloldo at Crown Jewel. I can't tell what will happen next though.
There are rumors that maybe a new member of the bloodline will be introduced to help Roman Reigns against Solo but I think they'll need more than just one.
The reason I said that is because I think Sami Zayn might be turning heel and join forces with Solo Sikoa. Solo still has the numbers game advantage. Solo has Jacob Fatu a very strong wrestler and has both Tama Tonga and Tanga Lao so they're four and Roman has just Jimmy and Jey. I know that, maybe it could be enough for Roman but they'll still be out number anyways.
Will the rock come and help Roman to defeat Solo? I really doubt it because the Rock's position is still not clear. He showed up at Bad Blood after the match, he didn't come to help Roman during the match, I don't think the Rock will help Roman rather I think he might turn on him or focus on Cody Rhodes. .
He already said he'll be returning to face Cody so maybe that's what's going to happen. How will the Rock defeat Cody Rhodes in a fair match? I think maybe it might not be that fair.
Rock is part of the TKO board of directors and will abuse his power to win the title. That's the only way we can now have Rock versus Roman for the Undisputed WWE championship.