Maybe?
I suspect that there will be some changes. Music might change due to licensing fees/issuers. I suspect there will be some cut content or "censorship" due to different cultural values and the needs of the different networks the show airs on. But I don't think this will be on the level of what 4Kids did with the Jelly Donuts...err...rice balls.
The issue isn't the composers. The issue is how the show gets distributed and how people are paid for the music. Twilight Wings was a YouTube series distributed directly by TPC, so it would be easier to keep the original music. It wasn't sublicensed to various TV networks around the globe.
I'm not a lawyer, but I can imagine that music licensing for a show like Pokemon is very complicated.
Funny, how the first time I saw 'Primeape Goes Bananas' that I was left wondering whether they really were rice balls or
jelly donuts as Brock mentioned. I was young back then, so I was kind of confused between the rice ball - donut reality. Ultimately, I pictured it as a rice ball with some jelly inside it!
The episode is also known to me for another scene, Ash officially catching a non-Pokemon inside a PokeBall, the
jelly donut! I burst out laughing when Mankey threw the jelly donut (oh, why am I even calling it that?) towards Ash's Pokeball and it actually
caught it and opened with the rice ball occupying almost the entirety of its space when any Pokemon, regardless of its size, could be stored inside the teensy cozy PokeBall.