Shanks and Teach already have a Poneglyph or Rubbing each.
Teach:
1st Poneglyph
2nd and 3rd :
Now Teach is going to get two more from Law
And has means of Deciphering
And surprise for those who say that Law or Pudding won't cooperate
Shanks :
1st Poneglyph
This Poneglyph was once in Fishman island as we say from Roger journey
Now for those who are saying, Vira or
Fullalead:
Fullalead makes no sense since Teach already gas the Rubbing from his visit to FI with WB
Vira:
Not possible because it was under WG direct or indirect control in Paradise
Sbs volume 25
Reader: Where is Villa? In Vol. 11, it's having a "coup d'état", in chapter 228 it's a "merry town". What's going on?
Oda: Oh. Well spotted. 400 years ago when Noland visited it, Villa was indeed just a merry town, but these days it's a violent and dangerous country in the midst of a coup d'état (rebellion). But it's not really so much what's happening in Villa, as what's happening all around the world at this time. I think you'll discover what I mean in the near future. Not as large as Alabasta, it's just a small country in the Grand Line.
So hold off on your sightseeing trips.
Villa or Vira is in Paradise. This negates the possibility that it has the 4th Road Poneglyph because shipping of Road Poneglyph from Fishman Island to Paradise is logistically impossible due to Marines controlling Shabondy Archipelago and Most of Paradise
2nd and 3rd Poneglyph :
Shanks is going to get these from Kid
And has means of Deciphering
So Shanks and Blackbeard are not behind Luffy as each of them have 3 Road Poneglyphs and a means of Deciphering. Same like SH crew has Zou, WCI and Wano Road Poneglyphs and Robin for Deciphering.
Level playing field
Scorecard:
Luffy:
Road Poneglyphs - 3 Zou, WCI and Wano
Deciphering method - Robin
Shanks:
Road Poneglyphs - 3, 1 4th Road Poneglyph in Elbaf + 2 From Kid(WCI and Wano)
Deciphering method - Ohara library in Elbaf managed by Jaguar D Saul
Teach:
Road Poneglyphs- 3, 1 4th Road Poneglyph rubbing from Fishman island + 2 From Law(Zou and Wano)
Deciphering method - Pudding hypnotized by Lafitte
Level playing field between 3 candidates.
Questions are welcome.
I will be glad to clarify any of your doubts