The Amazing Spider-Man Vol. 1 (1963-1998) #418

Plot

Gaunt stands revealed, and he's now a walking arsenal! Can even the combined efforts of Ben and Peter stop his mission of vengeance? Meanwhile, Mary Jane is going into painful labor, without Peter by her side, and under the watchful eye of the mysterious mastermind behind Gaunt! It all comes together, complete with a last panel reveal that will have all fandom gasping! [per next issue box]