The average VC receives 500+ decks a year, maybe more.
Why will your 2–3 slide “teaser” deck stand out? 99% of the time, it won’t.
What will is a deck detailed enough to present the entire story in a very compelling format.
What most VCs don’t have enough of is time. Not enough time to hear 500+ pitches.
Make the deck stand on its own. Make the deck so compelling, the VC already wants to invest before the first meeting.
Don’t listen to folks who tell you send a “teaser”. Very few folks have time for that. Unless you already have an insanely proven team. In which case the team itself is the pitch anyway. And even there — send more detail.