Huh, I had to google it but his hair was dark as Bruce Wayne. For some reason my memory keeps lightening up his hair, even though I just rewatched two of his films on Netflix a couple months ago...
Still feels like a besides the point tangent - he didn't look like Bruce Wayne to me or a lot of others, but he still worked just fine. Hair color isn't that important to adaptations.
That's a big if. If they've proven nothing else over the past decade plus, it's that they're consistently inconsistent. Superman and Superman II are iconic films, III and IV were jokes, Returns and MoS were divisive, and Supergirl and Steel are panned forever. Batman and Batman Returns are iconic films, Forever and Batman & Robin were jokes, Catwoman was horrible, The Dark Knight Trilogy are three of the best superhero movies ever, Joker is a spectacular film (whether it's the Joker is up for debate among some fans), and The Batman looks great. Batman v Superman is just bad. Justice League is worse - the Snyder Cut is better but not a masterpiece by any stretch. The first Wonder Woman is a classic, but 1984 seems to be divisive (I still need to watch that one). Aquaman was a MCU type juggernaut. Suicide Squad is mixed, I liked BoP but it's panned around here, and The Suicide Squad looks good. Green Lantern was no good, Constantine was alright but too different from the comic books, and Jonah Hex was panned. And I think that's all the DC films...
There's a lot of classic superhero films and a lot of bombs on that list, so sticking a landing with any given film seems to be a coin toss.