Alexandre is right.
I'm really curious though - how did you come up with the "draw from the sidekick stack" interpretation (since sidekicks are not included in the Cap expansion and no card references them)?
I assume by "the Bucky card" he's referencing the physical Sidekick card from Secret Wars that has the classic Bucky Barnes artwork on it, not Winter Soldier from the Cap75 expansion.
Also, if you think about it, it would make no sense at all to play a Sidekick card to draw two more Sidekicks (assuming of course that you do not have the new Civil War expansion with the Special Sidekicks). If this is what you were supposed to do, you would never actually get anything - it would simply be "play a card with zero ability text to draw two more exact duplicate cards with zero ability text." It would just clog your deck up with even more worthless cards than the starting zero cost SHIELD cards.