Both use the tag line “It’s about time.”First, the short teaser giving the Oct 7th date:
Doctor Who: Series 11 | Release Date Trailer

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Doctor Who: Series 11 | Release Date Trailer
The Doctor’s ready, are you? #DoctorWho lands Sunday 7th October 2018. Release date varies by country – check lo… | |

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Second, the new season 11 trailer:Doctor Who: Series 11 Trailer #2

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Doctor Who: Series 11 Trailer #2
The official trailer is here! “I’m the Doctor, when people need help, I never refuse.” #DoctorWho Subs… | |

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Here is the old trailer, from ComicCon: Doctor Who: Series 11 Trailer

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Doctor Who: Series 11 Trailer
First look at brand new Doctor Who. #DoctorWho #SDCC #SDCC2018 Subscribe to Doctor Who for more exclusive videos… | |

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Here is the old teaser, from World Cup coverage:Doctor Who: Series 11 Teaser

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Doctor Who: Series 11 Teaser
New Doctor Who, new friends, new adventures. #DoctorWho Watch more in the Series 11 Trailer here: bit.ly/… | |

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Still no sign of any villains, new or returning, nor returning friends.Dennis