The good news is the Jaegers still seem in relatively good shape in the episode, so they could be retrieved at a later date with the right resources.
It looks like these Pilots bit off more than they could chew and were forced to abandon their Jaegers after a battle gone awry.
What’s notable is all these Jaegers were featured in an adventure that introduced the possibility of a Kaiju-Jaeger hybrid, which is exactly what the teens encounter while they’re down in the bit.
It will certainly be interesting to see how much of that is referenced in Season 2 and if a rescue effort may be put together in order to retrieve some very valuable weapons for humanity.