Complex sentence: In February 2015, a sequel of' was announced, titled "The SpongeBob SquarePants Movie 3", and is planned to be released in 2019, for coincide with the 20th anniversary of the series "SpongeBob SquarePants".
Split into simpler sentences: In February 2015, a sequel of' was announced, titled "The SpongeBob SquarePants Movie 3". Its planned to be released in 2019 to coincide with the 20th anniversary of "SpongeBob SquarePants".