yes. the answer’s yes. Hiveswap has in fact already done this in the trailers. 

I am talking, of course, about the sexy horse statue outside Grandpa’s manor.
Some people immediately pointed to this as a random meta nod to Equius, which is really disappointing to me because there’s actually fleshed out canon lore behind it, which is so much more hilarious. 

“Jade’s parental unit, as the Pattern Breaking parental unit, has a much larger variety of strange, off putting interests.  Dad has FANCIFUL HARLEQUINS, Mom has EXSQUISITE WIZARDS, and Bro has RADICAL PUPPETS.  Grandpa has not one, but FOUR such interests, of the same descriptive two word format.  They’re all just as dumb though.  One reason among several for this was to create an element of uncertainty over what kind of item Jade would prototype with .  And by uncertainty, I mean misdirection, which is what I always mean by uncertainty.

Notice the colors of the lights in each room.  Orange, pink, and cyan, corresponding with Dirk, Roxy, and Jane.  The items have a loose correlation with the other three guardians too.  Knights in that Dirk is a skilled swordsman.  Roxy’s land is full of pyramids, Jane was grandpa’s long estranged blue lady.  You see how the gears are always turning.  Not only does everything mean something.  It turns out everything means EVERYTHING.  Now you know.”

–Andrew Hussie, Homestuck Book 3 Commentary

Hussie has confirmed that Grandpa’s INTERESTS reflect the Alphas. 

Which means that if you use occam’s razor Grandpa’s interest in HORSES–

most reasonably has to do not with some random callout to a troll Jake never met and doesn’t care about, but with his memories of Dirk. 

who is. you know.  all about horses and muscley horse dudes. So yeah, Grandpa–and by association Jake–have been deliberately fleshed out further by the narrative, with the wrinkle that, given time, Grandpa took on Dirk’s interest in horses. 

And he’s not even the version of Jake that dated Dirk, so…yeah. Whatever you think of their relationship, it’s a pretty powerful and funny look at their friendship.

Anyway Hiveswap is good. I’m excited.