In the realm of speculative physics and the concept of a multiverse, it is indeed possible to imagine scenarios where the effects of one universe's "Big Bang" could be observable from another universe. However, it is important to note that the existence and properties of a multiverse are still largely theoretical and speculative, and there is currently no direct empirical evidence to support the concept.
In certain versions of the multiverse hypothesis, such as the inflationary multiverse or the bubble universe scenario, it is postulated that multiple universes exist, each with its own set of physical laws and initial conditions. According to these ideas, the Big Bang that gave rise to our observable universe may have been a localized event within a larger multiverse.
If the universes in a multiverse are somehow interconnected or if there are mechanisms for information transfer between them, it is conceivable that some signatures or effects of a particularly intense Big Bang in one universe could potentially be observable or leave traces in another universe. However, the specifics of such interactions or observations would depend on the specific theoretical framework describing the multiverse and the mechanisms of inter-universe communication.
It is important to emphasize that the concept of a multiverse and the nature of interactions between universes, if they exist, are still active areas of research and speculation. Scientists continue to explore various theoretical models and strive to find empirical evidence to support or refute these ideas.