This is about Magneto and Galactus, NOT Dr doom or any other character. who cares about what dr doom would do or who or what or whatever, that is not the topic. This is about MAGNETO AND GALACTUS. Focus on that if you can.
So how would Wolverine take Vegeta out hmm? a few well placed blast will vaporize wolvies skin exposing his organs. Vegeta is still too fast and too strong even when depowered. Vegeta has NO morals and won't hesitate to cheat. I could probably see wolvie cutting off Vegetas hand or arm, but that would be wolvies last attack sending Vegeta into a rage that would leave nothing left of wolverine but a adamantium skeleton. you can't win on healing factor or weapons alone.