Based on the information provided, it's crucial to approach the situation with caution. The scenario with Karan Johar and Kriti San on 'Koffee with Karan,' along with the subsequent endorsement of the Immediate ReoPro 2.0 platform, raises some red flags. Here are a few points to consider:

1. Unverified Claims: While there are testimonials regarding significant gains, it's to remember that such testimonials can be misleading. Often, they do not represent the typical results that users may experience.

2. High Returns with Minimal Investment: The claim that an investment of 26000 rupees could potentially turn into millions within 11 weeks raises concerns. Such high returns with minimal investment are typically associated with high-risk ventures, including potential scams.

3. Investment Requirements: The requirement to top up an account with a minimum of 26,000 rupees is. It's important to be cautious when dealing with financial platforms that require significant initial investments.

4. Limited Time Offer: The urgency created by the statement that account registration is free only until a specific date (16.12.2023) is a common tactic used by potentially dubious to prompt quick decision-making.

Given these points, it's advisable to approach this opportunity with extreme caution. Furthermore, before making any financial or investments, it's crucial to conduct thorough research and consider advice from a qualified financial professional. If you have already engaged with this platform, it's recommended to review your transactions carefully consider reaching out to financial authorities or consumer protection agencies if you have concerns about the legitimacy of the platform.