Interesting tweet from the Stars beat reporter. Note that Honka's name appears nowhere on the list - my guess is because he (and by extension the Stars) doesn't think Honka will be ready to contribute this year.
So there's your rationale for a deal:
Nichushkin STILL isn't signed and Honka won't be ready - also, Nichushkin himself is still developing (only 29 points last year). Meanwhile, Zucc is a prime top-6 winger on a sweetheart deal and the Stars want to compete this year. If they up their bid, they can also have Klein to help out on the right side (important given the desire to compete right now).
Makes total sense for a retooling/rebuilding/whatever Rangers team that already has a bunch of guys (Buchnevich, Vesey, Skjei, McIlrath) who may need the season to grow into their roles. Lop a year off the Girardi & Staal deals serving as placeholders as the kids Skjei, McIlrath (if not moved in another deal), Graves and Honka all go through growing pains in the NHL/or in HFD... See if you can't move Staal at the deadline to a contender... Same with Nash once he's built back up his value... Options with Girardi get easier in the offseason (hopefully after he's had a much better season) when he loses his full NTC and his real money salary is only $4MM per year, providing a free $1.5MM in cap hit to a cap floor team...