Yeah, that is WAY outside of Ronnie's comfort zone as far as we can tell. A trade like that would require a massive outlay of assets going the other way, even for a team willing to eat Bobby Ryan's contract. That also doesn't fix the goaltending or our need for a 1C. Justin Faulk is probably not going to get us a 1C (more like a Ryan Nugent Hopkins level 2C at best).
Not that this would necessarily be a terrible thing, but a trade like that would require a complete reset of our entire roster for next season and seasons after that. While we are sitting way below the salary cap right now, our cap hit goes way way up next season with Slavin and Pesce's new deals and with Lindholm and Hanifin needing new contracts. Surely we would have to send some NHL players back for Karlsson and Ryan along with prospects/picks, so that balances out some of it (maybe Hanifin or Pesce would be part of such a trade), but we would still likely be much closer to the cap with still no #1 center and a pop gun offense.
I'm with JB...something that dramatic needs to wait for the offseason as it would really force several other changes to our roster to make it all work. I'm sure Dundon would love to work with Ronnie to make a big splash, but that is too splashy to do before the trade deadline in my opinion. Also Karlsson has a NTC allowing him to list 10 teams he cannot be traded to. You wonder if we are on that list....
But since this is all Trade Deadline fantasy land, let's throw out what that all might look like if we wanted to make that trade before the deadline. I'll go first:
Erik Karlsson and Bobby Ryan
for
Elias Lindholm, Brett Pesce, Julian Gauthier, and the Canes 1st round pick in 2018 (lottery protected)
Then
Justin Faulk
for
Ryan Nugent-Hopkins
That would replace Faulk with Karlsson and Lindholm with Nugent-Hopkins while opening up another BIG hole at RD (which would need to be closed via another trade or a huge leap of faith on Roland McKeown). And I might be WAY under what the Sens expected return is to make such a trade and well under what the Oilers would want back for Nugent-Hopkins. And of course, no #1 center still and no goalie help (Ottawa has none to offer, Craig Anderson is not a solution). Then you have to pay Karlsson eventually ($10 million+ cap hit and salary for a LONG LONG time, until he is well into his mid-30s).
Considering Ronnie hasn't even made a small trade of an NHLer for an NHLer mid-season in his entire career as our primary GM, its hard to envision the Canes being involved in something of that magnitude before the deadline. Always fun to think about big trades though. I can't say that such a thing isn't possible in the offseason, but before the deadline that would be a serious stretch to do.