I don't know about thousands. English will evolve over time.
I think it will adapt to be more analytical, simplified, and mark my words, English will use kanji in the next 500 years.
Discussion
I don’t think they will use kanji specifically.
I do agree simplification is inevitable. But what you are sensing is the constructed language that will replace natural language. It will use words and symbols derived from English, Latin, Mandarin, Arabic, and others. Probably some tyrant empire in the future will enforce it