I'm not sure how many posts that we've covered this in, there's probably one devoted strictly to this subject - but here goes:
Ventura's commentary is OK for WWE to use so long as it's a) not WCW footage, and b) has previously been released on a Coliseum or WWF(E) Home Video. This is per terms of the settlement they reached a few years back. Therefore, a WrestleMania DVD set should not be an issue.
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Which makes it odd that his commentary was edited out of the Wrestling Classic Finals and all the WrestleMania clips off the Greatest Stars of the 80s dvd set.