It's hard to say. Hot Toys has been cutting back on the included accessories in general. I don't know if they'd include all of those.
The Mk 85 is similar in price to the Mk 7, so I can see them adding enough accessories to be about even with that. The Mk 7 has one big main accessory (the pod), a bunch of small swappable parts, and a reused head sculpt.
The Nano Lightning Refocuser is already the large accessory for the 85. There's also a new head sculpt which they attach a lot of value to.
At best, I think we'll see the hand with the stones and one additional accessory.
I'm not sure it's a weapon, since I don't think they would've hid it as that's not much of a spoiler. Maybe they'll surprise us with the Nano Gauntlet. Either a clean one, or a damaged and enlarged one for the Thanos figure.