Complex sentence: Bernthal and other members of the cast were scheduled to appear at New York Comic Con 2017 to promote the series, but the panel was cancelled in following the 2017 Las Vegas Strip shooting.
Split into simpler sentences: Bernthal and other members of the cast were scheduled appear at New York Comic Con 2017 to promote the series. However, this appearance was cancelled in the wake of the 2017 Las Vegas Strip shooting.