Nino's a LW. If he's spent time on the right it's because we've had a lot of LW's and fewer RW's.
From the Wild's perspective I think trading for Kessel makes some sense if we can trade one of our LW's (presumably Zucker and Nino would be the most appealing) + a 1st/prospect. It gives us another right shot and should be an overall upgrade at forward. The concern is that Kessel's more expensive (though it's a very reasonable contract, in my opinion) and older, so maybe this just exacerbates our current problem: lots of expensive players that are in their 30's are due for decline in the next few years.
I get the skepticism from the Penguins' side though. Why trade a 92 point RW for a 55-65 pt LW? And that's assuming that either Zucker or Nino can reproduce their career highs. Personally I think both of those guys are safe bets to be in that 55-65 point range for 5-6 years, and that's in Minnesota. I'd kind of assume a bump in either one's numbers if they were playing with the Penguins (just like I'd assume a dip in Kessel's numbers in Minnesota). Both are likely to be on comparable contracts once Zucker re-signs, so that's not much of a difference between the two. The big difference, in my opinion, is that Zucker is an excellent even-strength scorer but surprisingly bad on the powerplay. Nino doesn't have Zucker's speed, but he's better on the powerplay and has a habit of making whatever line he's on better. Both can hold their own defensively.
Whether it's appealing to downgrade from Kessel to that for the sake of a late 1st, I couldn't say. To me Kessel seems to fit the Penguins like a glove, so if he's traded at all I have to assume it's partly for non-hockey reasons.