The various attractions in and around Portsmouth Dockyard (including the Submarine and Explosion Museums) all have their own separate histories and complex ownership and fundraising arrangements. Victory and Warrior are now part of the National Museum of the Royal Navy although Victory is also a commissioned warship. Its all very complicated!
They have until recently been marketed under an umbrella scheme with gate and certain other receipts being apportioned between them although they also host their own private and public events (you can get married on Warrior for example).
Mary Rose is owned by a trust which wanted a greater share of the overall receipts in recognition of the importance of the vessel, its extensive museum and future financial commitments. Unfortunately agreement could not be reached so the trust decided that Mary Rose would be marketed separately whch has made a lot of people rather unhappy (see Tripadvisor reviews etc.)
Their side of the story can be seen here.
https://maryrose.org/news/the-mary-rose-heads-into-new-territories/Basically the problem is that the Mary Rose Trust wanted a bigger share of the cake, and they do have a top class attraction, but basically the cake itself is probably too small and this would have had an adverse effect on the other attractions. I know from my own previous contacts with the dockyard when covering their events for Model Boats that keeping the whoe thing financially viable is constant headache. They put on a lot of events such as the Victorian Christmas to boost income but have lost the crowds that used to attend Navy Days when we used to have a proper navy and there were enough ships available to open a selection to the public. They must be praying for an opportunity for the public to visit HMS Queen Elizabeth I would imagine as that would certainly pull people through the gates.
Colin