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My following comments are speculation, but: The card designs could have been approved around the same time period as the first wave of 1996 cards, the contract could have enforced the release date of 1997 to stagger product hitting the market, the contract could have stipulated mew was to be withheld until approved, or indefinitely, or permission triggered by some other event such as a sales target
Best Multicolored Moms I really wanted to include Saheeli and her three planeswalker cards in here, but her cute little Constructs are artistic creations and artifact companions that do her bidding, at least as the lore stands now
Seel Valentine's Day Card Water you waiting for
As a baseline, use standard card dimensions and keep important elements away from the edge so minor cutting variation doesnt eat your mana symbols
Photos and videos of the never-before-seen treatment are on the way