I as Unicorn Will Guide narrates: My 2nd life in Equestria has been full of fun, excitement, and slice-of-life interactions with my friends. (A montage of happy moments throughout my head fanon play out) until.....

Dragon: Spike I'm your father.

U. Will (to self): No. That's not true. That's impossible. I thought I was the reincarnation of Spike's father! Can it be my time traveling contributions to ensuring the survival of Spike's egg in the past (S5 Finale) were a lie or some paradox?

.....

Tirek: So, that red Unicorn I've threatened to squash like a bug really is a bug! Well, time for revenge.

.....

Changeling Will: My Unicorn soulmate, we know that Chrysalis went to find the Tree of Harmony and knows now where it is. We have to tell them (The Mane 7).

Unicorn Will: You know that even though that Spike and the Mane 7 know about me being from the Real World, we're magically forbidden to tell them. 

....

Changeling Will: I know now why I can't transform to my butterfly form like the rest of the Changelings. It's because of Chrysalis. 

Unicorn Will: But we don't even know where she is anymore.

.....

Neighsay: I knew that Changeling Will Guide disguised as a red unicorn wasn't to be trusted. And I shall prove that to everypony.

.....

Unicorn Will monologue to himself: Usually, the way my Episode Memories ability don't reveal to me what's going to happen in Equestria until it's actually happening. But all throughout this season, I've been getting headaches from seeing the future of this world as a Brony from the Real World. I dare not risk the chance that my faulty E-Memories ability could bring irreversible trouble to Equestria due to me being a literal walking spoiler.

(I soul jump back to my human body in the Real World.)

Human William: I'm sorry, my little ponies. But I can no longer help you or visit you every again. (I picked up the remote and turn off the TV.)

Narrator: What shall happen to the Human-turned Disney Storytelling Unicorn and his Changelings soulmate and the fate of Equestria? Find out in the exciting 2nd half of Season 8: Will Guide's Departure from Equestria! Coming this Fall!