The Islanders pick is very unpredictable.
I feel that if the Devils do not get one of the Big 3 D (Power, Hughes, Clarke), then they will feel pressure to use this pick on a defenseman, especially a RD. Corson Ceulemans would immediately become the favorite, and Scott Morrow would also be a possibility. There would even be a chance of a "surprise pick" of a Aleksi Heimosalmi or Jack Bar or Logan Mailloux.
Or, the Devils could forego shooting-hand and simply take the best available D, which could very well be LD Stanislav Svozil. I have talked at length about Svozil and how terrific a young defenseman he is -- he has really shined in tournament play and in the Czech men's league. I have Svozil ranked in the range of my top 10 -- higher than most -- but the people who love him really love him. His hockey IQ is probably neck-and-neck with Clarke for tops in the 2021 class, and he's a good-sized kid with terrific passing ability and literally zero weaknesses in his game.
If the Devils get one of the Big 3 D, then I'd say the chances certainly go up that NJ takes a F with the Islanders pick. I would add that -- after taking both Holtz and Mercer in the 2020 draft -- a RW would seem less likely than a LW or C (and also, the draft is thinnest at RW of the 3 F positions this year). Several very high-upside kids could be available, and I'll list a few at all 3 F positions (in no order) so you can familiarize yourself:
C
Fyodor Svechkov
Aatu Raty
Francesco Pinelli
Zachary Bolduc
Mackie Samoskevich
RW
Matthew Coronato
Logan Stankoven
Xavier Bourgault
LW
Sasha Pastujov
Zachary L'Heureux
Nikita Chibrikov
Brendan Othmann
Simon Robertsson
Isak Rosen
Oskar Olausson
I would add that if Carson Lambos were to fall to the Islanders pick, this would be very, very interesting. He has been inconsistent in his play sometimes and he's out for the year with injury, but his upside is simply tremendous -- I would say that he compares to a left-shooting version of Alex Pietrangelo at the same age.