Stan Lee was 94 in Teen Titans Go! To the Movies when he played the character 'Stan Lee (voice)'.
That was over 6 years ago in 2018.
In 2018 he died aged 95, starring in 123 films in his career, 18 of those after Teen Titans Go! To the Movies was first released. If he were alive today he would be 101.
In Teen Titans Go! To the Movies, I think Stan Lee looks: