Complex sentence: The other Avengers, also having taken the pills, join Fury in confronting Gregory, however he reveals that he is prepared for any and all opposition to his plans and activates a nanite fleet in his body similar to his brother's, imbuing him with Super-Powers.
Split into simpler sentences: The other Avengers, also having taken the pills, join Fury in confronting Gregory. However, Gregory reveals that he is prepared for any and all opposition to his plans by activating a nanite fleet in his body, imbuing him with Super-Powers.