I don't think that person is a Habs fan and Habs wouldn't do that just because they'd want to add to Suzuki and Caufield, not replace them with Pettersson.
Habs offer would be something more like.
Kirby Dach
Habs 2024 1st around 10th (if it's 1st overall, I'd honestly deal for EP, but the rest would need to be edited)
2025 conditional 1st ( the 1st the Habs got from the flames and its only conditional, as the nucks now take on the same conditions the Habs have. Part of that condition is the ability to take Calgary's 1st this, but only if it's late, like 20th, or late. )
Adam Engstrom - not saying he's as good, but he put up similar point totals to Edvinsson and then had a really nice playoffs for a dman, solid prospect, but LD and furthest away from the NHL for the Habs, so most expendable)
Sean Farrell - small, but promising forward. Possibly the Habs best forward prospects with Roy, but Roy being drafted by the Habs and French makes it almost a non-factor for pretty much everyone. Not that there's a huge difference between himself and Farrell.
Joel Armia - 1 season left at not much. Should be able to return another pick.
2026 2nd(a little bit for EP, a little bit for taking on Armia
That's based on the offseason a year from now.
However, for fan proposals there's no point to even look at this if Johnson, Jiricek and whatever else that Cbus fan was offering is on the table. Take that and RUN.