Roman Reigns is set to return to RAW...just a couple of weeks after he got drafted over to SmackDown Live. Though he was initially "denied" by WWE officials due to his "obligations" as a SmackDown star, The Big Dog insisted that he's going to be there anyway.😂😂 Just have my music ready. I’ll be kicking things off on #Raw right at 8pm. https://t.co/DJsTczTKAF— Roman Reigns (@WWERomanReigns) May 5, 2019Naturally, the wrestling world has gone abuzz about the possibilities. There was even some criticism of the decision to have Roman Reigns on RAW, because it takes away from the brand split and the effect of the Superstar Shake-Up. Either way, like it or not, Roman Reigns will be on RAW and we're going to find out exactly what he has in store for us.With that being said, we understand that there are both good and bad possibilities that can come out of Roman Reigns being on RAW. Let's take a look at three options which should not happen and three which definitely should!#3. Terrible - Return match against The UndertakerA feud best forgotten aboutIn a way, it's kind of weird that the Saudi Arabia shows have become the new WrestleMania for The Undertaker. He's essentially stopped appearing at WrestleMania while his appearances on the Saudi Arabia shows are all but guaranteed.With The Phenom having a match at Saudi Arabia, officials would naturally want him to have the best opponent possible. Roman Reigns does fall under the "biggest opponent" umbrella, but it's a match that's completely unnecessary to run back and we know this because we saw the match become a disaster at the main event of WrestleMania 33.The Undertaker should have a relatively small role on the show and not take up a major spot by re-running a programme with Roman Reigns - one that was intended to retire him anyway. That would certainly take out the novelty from The Undertaker.