So which sauce can be the next generation of “Sriracha” ? or even Tabasco? Here are new hot sauces from different countries with different spicy flavors includes Gochujang, Sambal, Harissa, Sumac, and Dukkah. The potential next Srirachas.
1. Gochujang (Korea)

Gochujang is a Korean traditional fermented pepper paste. And It’s getting famous these days because of famous food influencer including David chang, Bobby Flay started to use this ingredient in their restaurant and dishes.
It has a Savory, sweet, and spicy fermented condiment made from chili powder, glutinous rice, meju powder, yeotgireum, and salt. It already adopted by mainstream chains like P.F. Chang’s, Noodle & Company.
2. Sambal (Southeast)

Sambal is Southeast Asia(Indonesian, Malaysian) A chili sauce or pastes typically made from a mixture of a variety of chili peppers with secondary ingredients such as shrimp paste, garlic, ginger, shallot, scallion, palm sugar, and lime juice. It is made of Chili, aioli, puree, and dipping sauce
3.Harissa (North Africa)

Harrisa is North African hot chili pepper paste, the main ingredients of which are roasted red peppers, Baklouti peppers or serrano peppers, spices and herbs such as garlic paste, caraway seeds, coriander seeds, cumin and olive oil to carry the oil-soluble flavors. Usually, it Used in soups and stews.
4. Sumac(Middle east)

Sumac is from the Middle East Has a fruity and astringent taste. And usually, it mixed with yogurts and sprinkled on dishes
5. Ghost Pepper sauce (India)

There is no specific “Ghost pepper sauce,” but there are so many hot sauces that use “Ghost pepper”. “Ghost pepper is originally from India and it called also “Bhut Jolokia”. This pepper is famous because of its extreme spiciness up to 1,041,427 SHU(Cholula hot sauce is 3600 as you remember.)
6. Dukkah ( Egypt )

Dukkah is an Egyptian hot sauce made with toasted nuts, seeds, and other spices. Usually, it uses for Sprinkled over food or used as a dip. Dukkah’s main ingredients are not pepper like I covered it made with different ingredients but it’s Spicy.
Conclusion
So what can be the next Sriracha? Personally, I think It will be the sauce made with Gochujang such as a Ssäm sauce. Gochujang itself, it’s hard to use as a sauce because of its thickness. but with a different mix of ingredients, it can harmonize as a one decent sauce flavor.
Ssäm Sauce which made by famous chef David Chang’s Momofuku brand is a spicy and tangy Korean chili sauce with Gochujang. Variations of Ssäm Sauce have been a staple in the pantry of the Momofuku kitchens throughout the years. Our Ssäm Sauce is made with gochujang, a traditional, umami-rich Korean chili paste, as well as miso, sake, soy sauce, and rice vinegar, but you can taste gochujang flavor in it.
Also there is luxury version of Hot sauce. Truff hot sauce is hot sauce with truffle oil and also may good ingredients . looks not really hot but it’s scoville level is over 2500 , don’t under estimate it .
But this is not the end, So many authentic “Hot Flavors” are newly developing, and customers keep seeking for new flavors. Maybe only you know what is next popular hot sauce.
References : Momofukumomofuku.com › ssam-sauce, https://www.mccormick.com/gourmet/recipes/sauces/fiery-fresh-sambal-sauce, https://minimalistbaker.com/easy-diy-harissa-paste/, https://alalali.com/eng/recipe/sumac-red-bell-pepper-sauce.html, https://www.taste.com.au/recipes/dukkah-2/19f316ec-0fec-4221-aa26-d5f7c676ced3