Quoting: jaok3
Lol, now you are getting cared away
I'm really not.
Holl has pretty much no value when multiple equivalent 3RHD are available, so from the perspective of a team that has made the post-season once since 11-12:
Severson (looking to extend w NJD) > Late 1st
Cooley (or #2 equivalent) for 10+ years >>> 2 years of Nylander
Cooley (or #2 equivalent) for 10+ years > 3 years of Marner
Bratt at 6.5 - 7.5m for 6+ years >>> 2 Years of Nylander
Bratt at 6.5 - 7.5m for 6+ years > 3 years of Marner
There's not a single good reason for the Devils to do OP's suggested trade.
Getting Nylander + late 1st + Holl for Bratt alone would be a bad trade for the Devils.
Trading Bratt + Severson + #2 pick for Nylander + Marner + late 1st would make the Devils marginally better in the short term but would long term cap them at the level of a middling team not being able to make it past the 1st or 2nd playoff rounds.
Like I said, add Marner and I still wouldn't want the Devils to do that trade.
It's the wrong move to make.