Flashpoint Paradox

In the heart of Central City, an accident left Barry Allen, in a nine-month coma. Time ticks away and the city faces its daily challenges with no protector.
Yet in this moment, a stranger from a distant world finds their consciousness thrust into Barry Allen's dormant body. With a surge of energy, he awakens as The Flash.
Transmigrated as Barry Allen but with his own memories and experiences, Bryan must continue Barry's life as a forensic scientist at the CCPD while concealing his newfound powers.
Yet mysteries abound... What was the true purpose of their transmigration into this world?