The formation of future supercontinents is a direct consequence of ongoing plate tectonic processes and the established supercontinent cycle, making citation of specific primary literature unnecessary.
The claim is a well-established and direct deduction from plate tectonic theory and the supercontinent cycle (as supported incidentally by papers like [3], [6], and [8]). However, because the cyclical assembly and breakup of continents is a fundamental consensus observation of geology, it functions as a matter of course rather than a contested empirical finding requiring individual proof, placing it under common knowledge.