The Neo Sploosh has an offensive set already, Point Sensors/Kraken allows it to mark opponents and set up flanks more easily. The Kraken is there as the "panic" button for when flanks or ambushes don't go right to save yourself and still possibly get the splat(s). Yes it sucks that Bubbler/Kraken is used like this but it works and is part of the strategy for the special so you have to deal with it. What this Sploosh needs is range, which rules out all but Inkzooka as the special when taken from that approach. Now that I've thought about it, I could honestly see it getting Seekers/Inkstrike (like the .52 Deco).
I'm confident this set of weapons will focus on the unused subs from Vol. 1 (Disruptor, Sprinkler, Splash Wall, Seeker, Point Sensor), and will be severely disappointed if we get more Splat/Suction/Burst Bombs. I only want to see 1 Burst Bomb set, and that is purely for the H3 to help its kill power (I want either that or Disruptor on it). The H3 I would like either Burst/Bubbler, Disruptor/Kraken or Sprinkler/Bubbler/Kraken (either special would do for that). It really needs a close range special, since it struggles in CRC, so I'm leaning more towards giving it Kraken so it can attack at close range where you get 2/3 shots land but can't get another round of shots off in time. Any other special would make it horrible, as none will work with the main weapon effectively.
The only other weapon of interest for me is the NZAP, and I would really love it to get Point Sensor/Bubbler. This set currently only exists on the Classic Squiffer and Custom Blaster, neither are shooter weapons either. It would give the NZAP a more ranked-orientated set and would encourage more people to use it. Overall, I think the potential special for this will be either Bubbler, Kraken or Inkzooka, as the current 2 NZAPs don't have aggressive specials like those mentioned.
I wouldn't get your hopes up of seeing this roller, it's essentially a worse Carbon. Splash Walls won't work well at all on it and the Inkzooka works best with Burst Bombs, where you can ink the ground on demand. Also the traditional Splat Roller died a long time ago, it used to be rare not to see a Krak-On Roller, now it's nowhere to be found. I'll try to pick it up because it has a ridiculous set, but I struggle with the Splat Roller, it is too difficult to land splats consistently because of the centre flick nerf. I don't know how close I need to be to get the splat and too many weapons kill faster than its swing time.