Originally Posted by
Omega Alpha
Yes, and that was due to mostly three reasons:
1- Writers wanting to introduce versions of every major character as soon as possible, never mind it took decades for most of them in the 616. That resulted in too many characters around, but few were truly fleshed out.
2- Choosing writers that were absolutely incompatible for the titles they were in- for example, Ult. X-men's reason of existence was to escape the convoluted 90's continuity and problems, and then Marvel adds to the title Robert Kirkman, a guy who comes saying he's a massive fan of Liefeld and 90's X-men and wanted to recreate everything there- and he starts with Ultimate Cable, who's Wolverine. And of course there's Loeb...
3- Ultimatum, which was the worst creative decision in the history of Marvel and killed fan interest in the line and put it in a corner, destroying long-term viability. Mind you, not that every comic that came after was bad, but the world had been destroyed and most major characters murdered, often in stupid or repugnant ways.
I still think a new UU could work, but only if you had a writer that knows what's doing spearheading the line, like Hickman is with the X-books.