Not so fast there. Gibson has never registered a trademark on the Firebird/Thunderbird shapes, but that doesn't mean they couldn't try to claim common law trademarks. The Lull is not an exact copy, clearly different headstock, different construction etc. OTOH the BaCHbird could invite legal action. Gibson has apparently threatened a few LP and SG copiers into making slight changes.
Still, this decision is marked as a precedent. That's ammunition to anyone with the money (for legal fees) to stand up to any of the big boys.