In regards to your answer to another anon about whether legion!len and legend!len were the same I have a thought about that and would love your perspective. What if it is a different Len. As in, barry's new timeline thanks to the flashpoint stuff creates a slightly rougher Len (my theory is lisa is dead or something cuz of lack of mention) So legion!len is actually alternate timeline!Len and legends!len is essentially a aberration but he died destroying the oculus so....
Ohhhh. I like it.
I can totally get behind the theory. that flashpoint changed Len’s life slightly and made him crueller. If it can change Caitlin’s literal DNA (which it did, because she didn’t have the metahuman gene in season 2 and then became a meta post-Flashpoint), then it having an effect on Len’s life is just as reasonable.
That being said, I personally won’t headcanon Lisa being dead, because I sort of abhor the thought of her death, especially having her death just be about her brother. I also think Len would be a lot meaner if she had died young or never been born. I can, however, see an argument for them being less close / some other type of rift between them, causing him to be colder.