Unfortunately, I do not have any information about a “90’s X-MEN – Teaser Trailer” featuring Mel Gibson and Tom Cruise. This appears to be a hypothetical or fictional trailer, as there were no major X-Men films produced in the 1990s with that cast.

The X-Men film franchise began in 2000 with the release of “X-Men”, which kicked off the modern Marvel Cinematic Universe. Prior to that, there were some attempts to adapt the X-Men comics to film, but none came to fruition in the 1990s.

While it’s an interesting idea to imagine what a 90s X-Men movie might have looked like with stars like Mel Gibson and Tom Cruise, this does not seem to correspond to any real upcoming or past project. Without more context about the source or premise of this “teaser trailer”, I do not have enough information to provide a meaningful summary.

If this is a fictional or fan-made trailer, I’d be happy to try and analyze it and provide my thoughts. However, based solely on the title and brief description you provided, I cannot confidently summarize a real film or trailer that does not appear to exist in my database of known information. Please let me know if you have any other questions!