Blu-Rays are always CFR so adding --fps 24000/1001 to ensure constant 24/1.001 fps should be fine.
Otherwise the settings look ok. But since neither mkv nor mp4 are part of the Blu-Ray specification successful playback on Blu-Ray players isn't guaranteed. That's only for "true" Blu-Rays with their m2ts structure, on pressed discs with encryption which you cannot produce as a home user. (I personally don't bother when creating mkv beyond maybe the level 4.1 or slices requirements imposed by some hardware H.264 decoders).
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