I know she won't be the focus of this next... next update.
Me saying that i think we'll see Dylan-Ellie before Ellie-Sophia is just a belief due to how slow everything involving Sophia must be.
On the other hand i bet Ellie already comes out of this Dylan-Christine event with a tinge of jealousy...
I take the opposite approach. One of the many reasons I believe that nothing will happen between Dylan and Ellie in the bonus storyline is simply that if there is and Patreon discovers it, then L&P is banned from Patreon and AWAM abandoned long before Dylan has a chance at Sophia.
It would be suicidal for L&P to have any Dylan/Ellie content any time soon. It's far too easy for any bitter ex-patron to screencap the AWAM dialogue showing Dylan and Ellie are siblings, and he's toast.
And since AFAIK the main reason Dylan fans play is for Dylan/Sophia content, I find it astounding that there is any support for Dylan/Ellie content at all at the moment.
It works both ways too. As an Ellie fan, I don't want to see any Ellie/Dylan content on the Ellie route before any Ellie/Sophia content. My only real hope of that is that I'm wrong about the bonus storyline finishing before PD16 - and that it finished
on PD16, and only after the second lesbian sex scene that is due on PD16.