Haven't occurred to Bruce to enhance his human physiology to match those of Diana (Titan-Olympian hybrid) and Kal-El (Kryptonian physiology)? Most JL members either have metahuman, alien, or unique physiology. The strongest members have a biological predisposition to be powerful.
Being a scientist, he extracts some of their DNA, refined it, and incorporate it into his own genome.
Batman
Character » Batman appears in 23804 issues.
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