Let's keep this one short and sweet. In the past year, Ubisoft has released Watch Dogs 2, For Honor, and Ghost Recon: Wildlands. These games have received varying degrees of success but none has set the world on fire.
Regardless, support for all three of these games is unlikely to be concluded. Watch Dogs 2 has received five different DLC packs already but I wouldn't be surprised to see one more story-based DLC pack shown off at the conference. Despite selling even less than the original, the game has gathered a fan base and Ubisoft will want to show them faith.
For Honor and Ghost Recon: Wildlands are a different story however. Despite charting well initially, For Honor only sold 1.72 million copies and it was reported this past week that the game has lost a gigantic 95% of its player base. That's horrendous news for Ubisoft but the company will definitely want to try and recoup those losses with some DLC to get fans back on board. Some decent DLC is probably a last throw of the dice for For Honor.
Ghost Recon: Wildlands on the other hand, sold a little better and has retained a player base. A major expansion for Wildlands just launched, titled "Fallen Ghosts", and has been received well. This makes another expansion for the game this soon unlikely, however I wouldn't be surprised to see a quick trailer for the recent DLC.