The timing of this announcement is strategically aligned with the team's ambitious and big-picture plans for Jacksonville and, specifically, the planned Lot J development.
When completed, Phase One of the proposed $500 million Lot J project in partnership with Cordish Companies would feature an entertainment district, a 200-room hotel, residential buildings offering 405 units and additional parking.
Overall, the Lot J project is designed to redefine the downtown experience and landscape while stimulating further development in the downtown and stadium area. It is also the latest, and biggest, endeavor spearheaded by the Jaguars to help Jacksonville realize its full potential.
https://www.jaguars.com/news/jaguars-to-play-back-to-back-home-games-in-london-in-2020
That looks like they plan to stay for the majority of future games in Jacksonville.