Detective Pikachu (Ryan Reynolds) makes his live-action movie debut in 2019. (Warner Bros.) ((Warner Bros. 2019))

NEXT SUMMER could become one fierce showdown between internationally beloved cartoon icons.

On Monday, trailers dropped for both Warner Bros.’s CGI-heavy “Detective Pikachu” (due out in May) and Disney/Pixar’s “Toy Story 4” (due out in June) — two franchises spawned in the mid-90s that could each stand to reap a billion dollars at the global box office next year.

Both trailers quickly sparked heat on social media.

The tale of “Detective Pikachu” — in the pattern of such films as “E.T.” — features a son who finds a sentient creature with whom he can communicate as they embark on an adventure.

The first live-action Pokémon movie is directed by Rob Letterman (“Shark Tale”) and features the voice of Ryan Reynolds as Detective Pikachu, with Ken Watanabe as Detective Yoshida.

Meanwhile, the “Toy Story 4” teaser returns all our old favorites — including Woody, Buzz and Jessie — as they soar before a blue-sky background to the Joni Mitchell tune “Both Sides, Now,” as sung by Judy Collins.

The circle of friends, though, eventually reveals new character Forky, a spork (voiced by Tony Hale of “Veep” and “Arrested Development” awkward-character fame) that is coping with an existential crisis.

Forky belongs to Bonnie, the girl who inherited Andy’s menagerie at the end of 2010′s Oscar-winning “Toy Story 3” (which grossed $1.07 billion worldwide). The fourth film in the franchise will be directed by “Inside Out” writer Josh Cooley with a screenplay by Stephany Folsom. The credited writers include John Lasseter, the Pixar co-founder who will exit the studio next month.

One connection between the two films to note: “Pikachu” reportedly received script polishing from Tom McCarthy, who shared story credit on Pixar’s “Up” — which was directed by “Toy Story 4” co-writer Pete Docter.