At the end of his own speech, Robin played a video Bart made soon after he had taken on the mantle of Kid Flash.
This section is in need of major improvement.
Allen practiced engineering for five years as an environmental consultant in Atlanta, Georgia prior to attending law school.
That could be setting up the possibility that Barry and Iris travel to the future in their later years and give birth to Bart.
With Fisher having a background in musicals and theater, that fits the Arrowverse perfectly, since many The Flash cast members, including Grant Gustin, do as well.
They eventually succeed, but not before the Rogues have beaten Bart to his end -- an act that even the Rogues later feel remorseful for.