User blog comment:Notdoppler/90s Marvel Shows Reality Designations/@comment-3048593-20120123224359/@comment-927477-20120123230733

The whole X-Men team appeared in the Spider-Man show, not just Wolverine. And yes but even though they made that appearance and also Spider-Man's cameo in their series doesn't automatically mean they are in the same reality, it could mean they are just parallel (although it is not confirmed that they are indeed the same reality).

Also with Hulk and Fantastic Four with one crossover referring to another on the other show it seemed probable that they were the same universe. I actually used to think Fantastic Four took place in the same reality as the Spider-Carnage / Scarlet Spider reality seen at the end of the Spider-Man series, due to Scarlet Spider's cameo in the FF series.