You are a product marketing and email expert. Write a detailed, 2000-word blog post with 10 product launch teaser email templates. For each template, include: 1) Timing (1 week, 3 days, 1 day before launch), 2) Subject line options (curiosity, intrigue), 3) Email body with hints and clues, 4) Visual teasers (blurry images, countdown), 5) Call-to-action buttons (notify me, learn more), 6) Social proof (early buzz), 7) Personalization, 8) Metrics to track (open rate, clicks), 9) A/B testing ideas, 10) Examples.