What are they?
According to the Silph Road this is what is available in the 2k eggs during the Easter event.
2k Eggs:
Aerodactyl
Dunsparce
Eevee
Elekid
Girafarig
Grimer
Growlithe
Kofffing
Lapras
Larvitar
Lickitung
Magby
Miltank
Onix
Phanphy
Rhyhorn
Scyther
Shellder
Shuckle
Skarmory
Smoochum
Sneasel
Stantler
Sudowoodo
Tangela
Tyrogue
Wobbuffet
Wooper
5K Eggs:
Chikorita
Cyndaquil
Totodile
10k Eggs:
Porygon
And according to Niatic this is the announcement for the Easter Event.
Pokémon GO Trainers,
Lace up your walking shoes and get ready to put a spring in your stepthe Pokémon GO Eggstravaganza is nearly here! From 1:00 P.M. PDT on April 13 to 1:00 P.M. PDT on April 20, 2017, a greater variety of Pokémon can now be found in 2 km Eggs, so get cracking and see what you find! Your Egg-venture doesnt stop there, thoughyoull also earn more Candy for every Egg you hatch!
Throughout this Eggstravaganza, youll also level up even faster with double XP! Combine this Egg-cellent bonus with a Lucky Egg, and youll earn four times the XP you normally would. To make this Eggstravaganza even sweeter, Lucky Eggs will be 50% off in the in-game shop!
Get out there, hatch some Eggs, and share your stories with us using #PokemonGO on your favorite social media channels.
The Pokémon GO team