London, UK - It's the news royal fans can't stop talking about: Prince Harry and Meghan Markle are returning to the UK after six years. But what does the shocking move mean for his brother, William?

An insider told Page Six that the royal comeback could drive a wedge between the heir apparent and his father, King Charles – yet Harry's move might also be the best chance yet for a reconciliation between the estranged brothers.

"It's going to represent huge challenges for William," a palace expert said, adding, "William is gonna have to figure out how he is going to respond to this."

Accordingly, the 44‑year‑old could find it difficult if the king were to invite his youngest son to royal events.

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"What is going to happen if Charles invites Harry to join the royal family for Christmas? What is going to happen if Harry wants to attend the Remembrance Day celebrations?" the insider wondered.

William and Harry remain at odds.

Since the serious allegations the 41‑year‑old made against his family about six years ago, the brothers' relationship has been severely strained, and contact between them has been virtually nonexistent to this day.

While questions loom over Harry and William's relationship, the situation with Charles is considerably calmer.

Just a few weeks ago, the Sussexes met with the king. Both sides want to spend more time together in the future, especially given the 77‑year‑old's cancer diagnosis.

Harry could also try to win his father over as a prominent guest for next year's Invictus Games in Birmingham.

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Proximity to the royal family is also said to be a factor in choosing their new home.

Reports indicate the Sussexes have found a house very close to Charles' Highgrove House. There, Harry, Meghan, and their children are expected to live in a "non‑royal residence."

A possible reason for their sudden return could be Meghan's rumored acting comeback, as the Duchess has reportedly received an offer for Netflix's The Gentlemen.