The main timeline.
After a year, the war between the dragons and the elves was still ongoing. Smoke and Flames of War were still spreading in many of the prime material worlds. The outer Planes were no exception. They had become warzones for the two powerful races.
The Lord of the Dragon Court suddenly disappeared.
Without this demigod Dragon that could sweep through the elven army in the main material plane, the elves in the various main material worlds could finally breathe a sigh of relief and get a moment of respite.
However, it was unrealistic to counterattack the Dragon race.
After all, even without garen's participation in the battle at the beginning, the Dragon race would still have the upper hand. However, without him, their advantage would be much smaller.
The elves in the main material world no longer tried to defeat and drive away the dragons in their own battlefields.