You can still make action oriented Monster movies, but the budgets need to be modest. The era of $100-150 million budgeted action pictures of Mummy, Van Helsing, Dracula, and Wolfman should be over.
Basically, Universal is targeting two sets of audiences here:
1) For an action-oriented movie of one of Mummy, Van Helsing, or Wolfman, you can probably earn $200-400 million in box office. Budget should be at most $50 million.
2) For a horror-oriented movie of any of the monsters, you can probably earn $100-250 million in box office. Budget should be under $30 million, and some of them should be at most $5-10 million for the least well-known.
After you make a bunch of successful, profitable movies, then you can discuss maybe trying crossover elements or shared universe elements. But get some successes for the group before bringing monsters together.