Interesting. I was just about to post a thread about why it made sense to bring back MITB to Wrestlemania this year. I suppose it can be re-arranged a bit to fit here.
The crux is that - No, I don't think the pay-per-view should be eliminated by any stretch. But I'm also reading rumors that suggest the event will be exclusive to Smackdown. If that's the case, then it absolutely makes sense for Raw to hold their own branded MITB match at Wrestlemania.
Doing so would also solve a lot of issues with the card. I've been looking at a lot of the rumored matches, and I put together a sampling of the card thus far:
Goldberg vs. Brock Lesnar
Roman Reigns vs. The Undertaker
Triple H vs. Seth Rollins
John Cena and Nikky Bella vs The Miz and Maryse
AJ Styles vs. Shane McMahon
Bray Wyatt vs Randy Orton
Chris Jericho vs. Kevin Owens
Charlotte vs. Bayley vs. Sasha Banks vs. Nia Jaxx
What's striking about this potential card is how few superstars are being used as of yet. We have 8 rumored matches featuring just 20 superstars (14 men; 6 women). The WWE has tried its best to include all of its talent on the Wrestlemania card the past few years, but that's going to be incredibly difficult given this potential lineup. Now, I get that Wrestlemania has a two-hour pre-show. I also understand that it's scheduled for four hours, and that last year's event went 40 minutes over that mark. But that event was absolutely crucified for running so long, and it only actually featured 12 matches all night.
It's going to be next to impossible for the WWE to include all the talent on the show without running longer than last year. Consider that we're probably going to see an Intercontinental Title Match (Ambrose vs Corbin?). We're definitely going to see a Cruiserweight Title Match (Neville in a fatal 4-way?) We're going to see a Smackdown women's match (a six-person tag between Natalya/Bliss/James vs. Lynch/Naomi/Carmella?). And we're going to see at least one tag team title match (Club vs. New Day?), possibly two (American Alpha vs Usos?). Now we're up to at least 12 matches, and we haven't found any spot for Braun Strowman, Samoa Joe, Finn Balor, Big Cass, Cesaro, Sheamus, or Sami Zayn.
Sure, you have the Andre the Giant Memorial Battle Royal, but we all know that match is nothing more than the WWE's attempt at getting everyone on the card. It's there for guys like Heath Slater and Goldust to make an appearance. It's not there because you ran out of options for Finn Balor or Samoa Joe! That battle royal needs 3 or 4 credible challengers and the rest is just fodder. To stack it with the aforementioned guys would be a huge, huge waste.
So I do think Raw should have their own MITB match featuring Strowman, Samoa Joe, Finn Balor, Big Cass, Cesaro, Sheamus, Sammi Zayn, and one other superstar (Tye Dillinger?) The MITB match allows them to showcare their talents much better than a battle royal would.