Dr Karina Mogue - Tumblr Posts
Ok, so about Dr Karina Mogue. I think she will be the RDA scientist who will try to figure out how Spider was changed and how it can be replicated. I think she will be brought to study the results from whatever tests they'll run on him (maybe even the samples they will take) when he is captured by RDA after the miracle. I also think that it will lead her to trying to figure out Eywa - what she is and how she works.
I'm not sure if she will be evil (Michelle Yeoh was so great and clearly had a lot of fun in Star Trek in very Recom Quaritch like role) and try to use this knowledge to destroy Eywa and adapt humans for Pandora so they can replace Na'vi. Or if her work will lead her to change sides and maybe use her knowledge to save Earth instead (I'm rooting for this option).
ooh that's a great theory! With all the strange stuff leaked that will happen to Spider in A3, it makes sense the RDA would want to study it, and if there's gonna be a big focus on it in future movies it also makes sense they'd introduce a new character as the main scientist studying it. I hope she'll join the resistance too, but I bet Yeoh will be able to pull of a good villain if not!
But this just makes me scared for Spider. It's unclear how the "miracle" will happen to him, but one theory my reddit friend u/ellestra came up with is that Spider himself won't have a physical or genetic change, but rather that the sacred strands from one of the spirit trees will go inside of his lungs and act as a built in filter, filtering out the harmful gases in the atmosphere but letting oxygen pass through. Similar to how humans on earth have bacteria cultures in our guts that have a symbiotic relationship with us; the bacteria cultures get a warm, moist environment to live in and we get help digesting our food. The sacred strands will be like that, living off the nutrients in his body and filtering the unbreathable atmosphere in return.

It would be similar to what happened to Grace, when the na'vi were able to create a temporary kuru for her so she could connect with Eywa before dying. I believe u/Ellestra's theory is pretty likely, much more likely than Spider undergoing a genetic/physical mutation, cause basically his entire cardiovascular and respiratory system would have to be drastically changed to adapt to Pandora's gasses.
All this is to say is that if the RDA wants figure out what happened to Spider, they'll probably have to look into his lungs, which I imagine would involve some extremely unethical science experiments... poor Spider 😠I hope Dr. Mogue will be a good guy and not let anything too terrible happen to him if this theory is true but we'll have to wait and see.