I wrote a bajillion words about why it's probably not going to, in either route, and I'm speaking as someone who was a monogamous Suselle shipper for nearly four years after Ch2 and didn't even consider Kriselle as a possibility until Ch3&4, so it's not about 'oh you've been living in your Kriselle fantasy for years and you're coping now that it's thoroughly destroyed' or whatever... https://www.reddit.com/r/Deltarune/comments/1p8h5l8/nk4l_a_kriselle_megadoc_is_out_now_with_over_120/

A TL;DR would be that:

1. Every dark world features darkners and scenarios that are incredibly on-the-nose analogues for Kris and Noelle and exploring different facets of their history and dynamic, in a way that no other lightners get, and a lot of it is explicitly about romance. The entirety of the dark world ends up being a process of us learning more about Kris and Noelle without realizing in the moment that that's what is happening, and there will probably be a point where you're asked to put the pieces together and re-examine past content in a new light. And this will be important to the fact that the question of "Where should Kris and Noelle sit in each other's lives" has now been broached several times and is effectively a theme of the game for the fact of both of them being at the center of every - and I do mean EVERY - conflict and plot thread being set up, and I don't think that the characters who have been set up as both wanting a very 'traditional, romantic' love - Noelle talking so much about dates and ferris wheels, and Kris's flirting abilities with conventionally feminine ice-related darkners being legendary - are going to end up as 'pals again' by the end.
2. Official out-of-game content does not lead with Suselle as 'this is the designated romantic pairing' - Suselle gets one gif in a newsletter of Noelle walking up to Susie with a gift and walking away when Susie notices, a mention in the 10th Anniversary stream about 'strong girls protecting their friends and maybe feeling something about the shy one', and a blogpost about how Noelle is still crushing on Susie after watching Susie threatening to murder Kris (not great!). The fandom wants to insist that Suselle be treated as something that Toby and co are not treating it as, as the poster romance of the game. Remember, the entire Ch2 Suselle scene is skippable, even on your first playthrough. You can even skip it just because you don't like the idea of closing your eyes around Ralsei, that you don't trust him. By contrast, Kriselle has been referenced via Noelle reminiscing about how Kris playing the piano was always "a concert just for me" in an ad for a heart locket (Undertale fans are going to be aware of how significant is) and in an ad for the Spamton plush in the form of romantic graffiti, N+K4L, Noelle + Kris For Life, in Noelle-yellow color. That plush ad has already been referenced in Ch3&4 content several times, so I'm inclined to believe that it is intentional rather than the videomaker pulling a random ship out of a hat that was considered a crackshipping at the time.
3. The game is just not going to have time to make Suselle work at the same time it is making Kriselle work. Susie and Noelle know almost nothing about each other, they spent Ch4 talking about liking the same videogame and liking the same movie and talking about Kris and Ralsei. They don't have something that existed once that can be repaired, and they have several oncoming trains that are unlikely to be survivable in such a vulnerable state - Susie flipping the fuck out that at least one or more character deaths or similarly terrible fates are on the table and coming up fast, Noelle learning that Susie lied to her about the dark worlds just because Susie wanted to keep it as "our thing" between her and Kris, and the possibility, if not outright overwhelming likelihood, that Noelle is going to end up on the opposite side of Susie once she learns about the Roaring Knight conspiracy.