I personally don't want any crossover between Creed and Alter Bridge. Alter Bridge has spent these 20 years proving to people that they can be a standalone band. I understand people take a intrigue of the band because of the Creed connection and Myles' work with Slash and Adam Copeland (formerly known as Edge in WWE) using Metalingus as his theme song, but at the end of the day, all of the exposure means not much if the band doesn't have the songs that has any staying power and AB has 7 albums in their belt that proves they have the catalog to stand on their own feet. I wouldn't be happy about it at all if I go see a tour that has both AB and Creed and AB only plays like 45-50 minutes and just be second fiddle. Imagine going to a show where your favorite f'en band is 2nd fiddle to another band that 3/4ths of the members are a part of and is the headliner playing in front of the most people. I will always have this sense of discomfortable and non-enjoyment even if everyone is all smiles.
That being said, since all of these bands (and the guys from Sevendust) are under the same management group, I could see a festival tour at some point where it's Creed, Alter Bridge, Sevendust, Tremonti, Projected, and a Myles solo set all under the same bill.
As for what's going in the cruise, things seems look good. Band looks like they are having fun. Good for morale. I hope that atmosphere can keep going throughout their future shows throughout the year. They shouldn't feel forced to release a new album soon if they feel like the material they have isn't up to what they like. They should take the Porcupine Tree route that they did with Closure/Continuation where you have something like this quote I found on the wiki page of the album. "Wilson and Harrison expressed their contentment with the making of the album, having written it with complete creative control, on their own time-table, without intervention from a record label, and not created out of a necessity for money or fame due to their separate projects having failed."
Oddly enough, there are some very good comparable to the Porcupine Tree reunion to the Creed reunion. You see Steven Wilson saying on and on that he feels no satisfaction on the idea of a Porcupine Tree reunion and that if he wants to do it, it will be on proper terms and not get in the way with his solo stuff. For Creed, you have Mark saying for years that he doesn't have the time to do Creed due to AB and the solo stuff (and now with the Tremonti Sings Sinatra work he's doing with NDSS) and that he play with the idea of the Creed reunion if there is enough significant interest from the people and if the notion nowadays is that they are not perceived to be a joke (which the idea of them being a joke in the first place is just mean-spirited from those people that should have no credibility whatsoever).