LOI to Super8K timelines likely vary greatly. This 2021 merger deal between the Seven Oaks SPAC and Boxed appears to have taken exactly six months. https://www.globenewswire.com/news-release/2021/06/14/2246390/0/en/Boxed-to-Become-A-U-S-Publicly-Traded-Company-Through-Merger-With-Seven-Oaks-Acquisition-Corp.html https://finance.yahoo.com/news/boxed-inc-announces-filing-super-211200682.html